javax.servlet.ServletException using Tree2

[Hendrik Neumann]

Hi everybody,

I try to develop my own component which renders a Tree2 component within the encodeBegin(FacesContext myContext)-Method of my own UIComponent.

For this purpose I use the following code-snippet:

    public void encodeBegin(FacesContext myContext) throws IOException
    {
        ResponseWriter myWriter = myContext.getResponseWriter();
        Property props = myPropertyEditor.getModel();
        try
        {

[...]
            Application myApp = (Application) myContext.getApplication();
            HtmlTree myTree = (HtmlTree)myApp.createComponent(HtmlTree.COMPONENT_TYPE);
            myTree.setValue (de.rub.swt.csseditor.db.Database.getDB().getCssAttributesAsTreeNode());
            myTree.setVar("node");
            myTree.setVarNodeToggler("t");
            myTree.setShowRootNode(true);
            myTree.setId(myTools.createUniqueId());

            HtmlPanelGroup rootContent = (HtmlPanelGroup) myApp.createComponent(HtmlPanelGroup.COMPONENT_TYPE);
            Map rootFacet = myTree.getFacets ();
            rootFacet.put("root", rootContent);
            HtmlOutputText rootText =  (HtmlOutputText) myApp.createComponent(HtmlOutputText.COMPONENT_TYPE);   
            ValueBinding rootBinding = myApp.createValueBinding("#{node.description}");
            rootText.setValueBinding("value", rootBinding);
            HtmlGraphicImage root = (HtmlGraphicImage) myApp.createComponent(HtmlGraphicImage.COMPONENT_TYPE );    
            root.setValue("misc/folder/blue-folder-open.gif");
            rootContent.getChildren().add(root);
            rootContent.getChildren().add(rootText);


[...]

        }
    }

This snipped works great, but the problem is: HtmlCommandLinks are not working when I add them to the PanelGroup:

            HtmlCommandLink editIconLink = myTools.createActionListenerLink("edit this node", myContext, "switchView", "propertyeditor");
            editIconLink.addActionListener(new SwitchWindow());
            rootContent.getChildren().add(editIconLink);

When I click on such a link I'll get the following error:

StandardWrapperValve[Faces Servlet]: Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
        at org.apache.myfaces.custom.tree2.UITreeData.getDataModel(UITreeData.java:420)
        at org.apache.myfaces.custom.tree2.UITreeData.setNodeId (UITreeData.java:320)
        at org.apache.myfaces.custom.tree2.HtmlTree.setNodeId(HtmlTree.java:95)
        at org.apache.myfaces.custom.tree2.UITreeData.processDecodes(UITreeData.java:172)
        at javax.faces.component.UIComponentBase.processDecodes (UIComponentBase.java:880)
        at javax.faces.component.UIForm.processDecodes(UIForm.java:144)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:880)
        at javax.faces.component.UIViewRoot.processDecodes (UIViewRoot.java:306)
        at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:79)
        at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
        at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java :144)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._invokeDoFilter(AdfFacesFilterImpl.java:367)
        at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._doFilterImpl(AdfFacesFilterImpl.java :336)
        at oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl.doFilter(AdfFacesFilterImpl.java:196)
        at oracle.adf.view.faces.webapp.AdfFacesFilter.doFilter(AdfFacesFilter.java:87)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java :214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal (StandardContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java :104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext (StandardValveContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext (StandardValveContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service (CoyoteAdapter.java:160)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java :705)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
        at java.lang.Thread.run (Thread.java:534)

But my HtmlCommandLink renders a different UIComponent - without any tree-components. Therefore there should be no NullPointerException in UITreeData because the linked JSP has no Tree2-component!

What am I doing wrong? Does anybody of you guys has any helpfull hints for me?

Greetings,
Hendrik